Retractable coil stop



5,1958 J. N SHEPARD 2,846,041

' 1 RETRACTABLE con. STOP 1 Filed May 8; 1957 2 Sheets-Sheet 1l/VVE/VTOR 46 JAME$N.$HEPARD 10 /Gouda 5 0461?! 2/ his Attorney.

Aug. 5'; 1958 J..N. 'SHEPARD RETRACTABLE COIL STOP 2 Sheet-Sheet 2 FiledMay 8, 1957 4,846,041 j RETRACTABLE cornsror dairies 1 N. -Sh'epard,'Goncor'd, Calif.,-= assignor 'to United tStates Steel Corporation, acorporation of New Jersey This 1 inventionrelates: to =a' retracta-ble'coil stop and more: particularly to such a stop for bringing to restlarge coils :of steel strip being discharged from a cold rolling ortemper mill and being --delivered to abander. Prior to an'y inventionthe-coils rolled-"down adelivery ramp and were gradually brought to stopby rolling-up a sharp inclined plane at the end of the delivery ramp,then rolling backuandz forthiuntili th'eyticame to restfat the lowestpoint of the ram. This took .between30and 45 seconds so that itdelayedthebandi'ng operation. It also constituted a safety hazard.ln-additiom the prolongedrolling mp and down the delivery ramp' causedexcessive scratching of the finished coil.

It is therefore an object of my invention to provide a coil stop whichwill bring the coil to rest faster and with less possibility of injuryto the mill crew.

This and other objects will be-more apparent after referring to thefollowing specification and attached drawings, in which:

Figure 1 is a plan View of my device with parts broken away for purposesof illustration;

Figure 2 is a view taken on the line -IIII of Figure 1 showing the coilstop in one extreme position;

Figure 3 is a view, similar to Figure 2, but showing the coil stop inthe opposite extreme position;

Figure 4 is a schematic view of the pneumatic system used in my device;and

Figure 5 is an enlarged fragmentary view taken on the line V'V of Figure1.

Referring more particularly to the drawings, reference numerals 2 and 4indicate the entry and exit ends of a delivery ramp. The exit end 4 hasan upwardly inclined portion 6. Between the portions 2 and 4 is anopening 8 for receiving a steel frame 10 which has a vertical entry wall12 and a vertical exit wall 14. Steel plates 16 are welded around theframe 10 adjacent the entry end to provide a'shelf 18 for a purposewhich will appear later. Vertical plates 20 are welded to the bottomplate 21 of the frame 10 adjacent the entry end and are adapted toreceive caps 22. Support plates 24 extending upwardly to the shelf 18may be welded to' the frame 10 and plates 20 as shown. A transversever-tical plate 26 is welded to the bottom 21 on the exit side of theplates 20. A pair of transverse grooves 28 are provided in the bottom ofthe frame 10 for receiving keys 30 which are fastened to the bottomplate 21. A hearing plate 32 made of bronze or the like is fastened tothe bottom 21 between the keys 30. The keys 30 and hearing plate 32 maybe fastened in any suitable manner such as 'by means of counter-sunkscrews 34. A rubber bumper 36 is attached to the plate 26vby means ofcap screws 38. A similar rubber bumper 40 is attached to the wall 14also by means of cap screws 38. A guide groove 42 is provided along eachlongitudinal edge of the frame 10 for receiving a slide 44 as best shownin Figure 5. The guide groove 42 may be formed by means of a bronze jib46 and a backing plate 48 fastened to the bottom 21 by means of capscrews 50. Dowel pins I 2,846,041 Patented Aug. 1,958

may also beused if desired. H The slide "445inc1ujd'es a base 52 havingfour vertical plates "54' welded thereto (at its entry end. Plates 54have aligned lio'les56therein for receiving connecting pins 58. A pair'of air cylinders-60 are :provided with pins 61 mounted 'in holes 62provided between the plates20 and caps 22,*th'eicaps 22 being fastenedto plate 62 by means "of cap scr'ewsj64.

A plate 65 may be welded to basef21 and the' twocenter plates 20. Piston'rods '66 of the. cy1in'de'rs60 are'piv. "otally connected to pins 58.A'port 68 is provided at the forward end ofeach cylinder60 and isopen'to'at- A port 70 is provided ineach of "the cyl- .inders 60 at itsrearward-end. The po'rts'f70are 'conmosphere.

nected by means of piping 72 which in tu'rn is connected to a reliefvalve 74. A check-valve '78'is provided'in the piping 72 betweencompressed airfisourceand relief valve 74. A control valve' 82*isprovided in: theJp'iping' 72 between the air supply 80 and checkvalvel78; 'A plurality of plates84 are welded to the base 52 inparallel'relationship to the plates 54. A stopblock .286 is fastened tothe base 52"-by means of cap screws 88. A

transverse abutment 'is provided in the entry endof slide 44 and asimilar abutment92 on the =exitend thereof. "The plates 54 and {84"are'provid'ed :with aligned openings 94j for receiving 'a shaft '96.'A' coil stop98 is pivotally mounted on the shaft 96. The coils'top 98consists of a flat plate 100 and a curved plate 102 welded to each otherand to a plurality of vertical plates 104 and 106. Each of the plates104 'have a downwardly extending leg 107. Plates 104 and 106 areprovided with aligned openings 108 for receiving the shaft 96 and alsowith aligned openings 110 for receiving spring shaft 112. A pair ofspring guides 114 are mounted on shaft 112,

one on each side of the longitudinal center of the slide 44. A pair ofsomewhat similar spring guides 116 are welded to the base 52 one inalignment witheach of the guides 114. Springs 118 extend between'thespring guides 114 and 116. A cover 120 is placed on the shelf 18 toprotect the mechanism and to serve as a continuation of the ramp 2.Spaced apart vertical plates 122 are welded to the rearward end of cover120 and are in alignment with the spaces between plates 54 and 84. Itwill be understood that lock washers, cotter pins and bushby opening thevalve 82 manually or automatically by movement of the coil C. The aircontinues to be admitted through check valve 78 until the pressure inthe cylinder 60 is equal to the line pressure. rolls down the ramp 2 andover cover 120. The coil C will strike the coil stop 98 and cause it torotate about shaft 96' and compress springs 118 as shown in 'Figure 2.This slows down the movement of the coil. After the coil passes over thecoil stop 98 the springs 118 will cause the coil stop to rotate aboutthe shaft '96 to its original position shown in Figure 3. Movement ofcoil stop in this direction is limited by contact of the legs 107 withthe stop block 86. The coil rolls up the inclined plane 6 until itsforward motion is checked and then rolls back against the coil stop 98causing the slide 44 to move to the left as seen in Figure 3. Movementof the slide 44 is retarded by the compression of the air trapped in thecylinder 60. This cushion effect of the compressed air stops the reversemotion of the coil C which then rolls forward over thev delivery ramp 4and The coil C up the inclined plane 6. The compressed air in thecylinder 60 then expands forcing the slide 44 to the right until it isarrested by the bumper 40. This cycle is repeated until the coilisbrought to a stop. The relief valve 74 is set so that if the pressure inthe cylinders 60 becomes too great it will open to allow the excesspressure to dissipate. Movement of the coil C and slide- 44 will befinally stopped by the slide contacting the bumper 36. The valve 82 maybe closed either manually or automatically as desired.

While one embodiment of my invention has been shown and described itwill be apparent that other adaptations and modifications may be madewithout departing from the scope of the following claims.

'I claim:

1. Apparatus for stopping a coil rolling along a ramp having a raisedportion at one end thereof which comprises a slide mounted below thelevel of said ramp intermediate the ends thereof, means for urging saidslide toward said raised portion of said ramp, 2. member pivotallymounted on said slide for movement about a generally horizontal axis,said member being movable from a lower position in the general plane ofsaid ramp to a raised position above said ramp, and resilient meansurging said member to said raised position.

2. Apparatus for stopping a coil rolling along a ramp having a raisedportion at one end thereof which comprises a slide mounted below thelevel of said ramp intermediate the ends thereof, means for urgin saidslide toward said raised portion of said ramp, a member pivotallymounted on said slide for movement about a gen erally horizontal axis,said member being movable from a lower position in the general plane ofsaid ramp to a raised position above said ramp, said member in itsraised position having two sloping sides above the ramp to retardmovement of said coil, and resilient means urging said member to saidraised position.

3. Apparatus for stopping a coil rolling along a ramp having a raisedportion at one end thereof which cornprises a slide mounted below thelevel of said ramp intermediate the ends thereof, an air cylinder havinga piston rod connected to said slide, means for admitting air to saidcylinder to move said slide toward said raised portion of said ramp,means preventing escape of air from said cylinder, a member pivotallymounted on said slide for movement about a generally horizontal axis,said member being, movable from a lower position in the general plane ofsaid ramp to a raised position above said ramp, said member in itsraised position-having two sloping sides above the ramp to retardmovement of said coil, and resilient means urging said member to saidraised position. i

References Cited in the file of this patent UNITED STATES PATENTS

